-228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10)

by Small Parts

Product Features

• Made of silicone for use with a variety of chemicals and fluids
• Can be used across a wide temperature range from -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C)
• Round in cross-section to provide a seal between cylindrical overlapping surfaces
• Durometer (hardness) of 70A for resistance to penetration
• Meets standards defined by Aerospace Standard AS568A

Product Details

• Shipping Weight: 1 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000FMYTD2
• Item model number: 228
• Average Customer Review: 4.8 out of 5 stars  See all reviews (19 customer reviews)
• Amazon Best Sellers Rank: #6,453 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • #51 in Industrial & Scientific > Hydraulics, Pneumatics & Plumbing > Seals & O-Rings > O-Rings

Product Description

This silicone O-ring is red in color, round in shape, has a durometer of 7OA, and is designed for use in a wide variety of sealing applications.

Silicone is acceptable for temperature applications between -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C). It has good resistance to ozone, weather, detergent, salt water, engine and transmission oil, non-petroleum brake fluid, hydraulic fluids that resist fire, vegetable and animal oils, and high molecular weight chlorinated aromatic hydrocarbons. Silicone is vulnerable to mechanical wear and tear, water and steam over 250 degrees F (121 degrees C), aromatic hydrocarbons (benzene), chlorinated hydrocarbons (trichloroethylene), acids and bases, and hydrocarbon fuels.

O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section and a hole in the center, similar to a doughnut. O-rings are available in a number of sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.

This silicone O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.

This silicone O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.

Customer Reviews

Most Helpful Customer Reviews

5 of 5 people found the following review helpful:

5.0 out of 5 stars Perfect replacement..., May 3, 2008

By 

Lewis Simper (USA) - See all my reviews
(REAL NAME)   

This review is from: -228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 5) (Misc.)

I bought these as a replacement for a damaged O-Ring on my Nissan Thermos Travel Mug. These are perfectly suited to that task.

4 of 4 people found the following review helpful:

5.0 out of 5 stars Great replacement for Nissan spill proof travel mug, January 14, 2011

By 

John O'Meara - See all my reviews

Amazon Verified Purchase

This review is from: -228 Silicone O-Ring, 70A Durometer, Red, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 10) (Misc.)

I bought these o-rings as a replacement on my Nissan spill proof travel mug. I use this mug all the time. It will keep a cup of freshly made tea or coffee hot for 3-4 hours if left closed, or at the right drinking temperature for a full hour. I tried to find a replacement for the o-ring at the Nissan website but could not. These o-rings are an excellent replacement. The mug closes water tight and works like new. Highly recommended for this application.

3 of 3 people found the following review helpful:

5.0 out of 5 stars Can be used to make an eye dropper ink fountain pen, September 12, 2009

By 

lawyerwhocooks "lawyerwhocooks" (Atlanta, GA USA) - See all my reviews

Amazon Verified Purchase

This review is from: -010 Silicone O-Ring, 70A Durometer, Red, 1/4" ID, 3/8" OD, 1/16" Width (Pack of 100) (Misc.)

These are very strong little o-rings, with plenty of tensile strength. I read a recent DIY article online about turning certain fountain pens (Platinum Preppy line) into eye dropper fountain pens using this size o-ring. I wanted to give it a try, and I must admit it worked like a charm. No leaks, perfect. Search online for "eye dropper fountain pen" and "o-ring" or perhaps "make your own" and you should be able to find it, if you're interested. Fun, and a good use of the pen and the ink.